It is scandalous that this book should be out of print, for it is without a doubt the best primer on political science ever written. If you are going to read only one book on politics, this should be it. Burnham is no ideologue with an axe to grind. He merely seeks to describe how politics works in the real world of fact. In pursuit of this aim, he discusses five of the most scientifically rigorous of all political thinkers: Machiavelli, Vilfredo Pareto, Gaetano Mosca, Robert Michels, and Georges Sorel. Together, these thinkers represent, according to Burnham, the Machiavellian tradition in political thought. Machiavellians, Burnham tells us, regard politics as a science devoted to describing facts as they really are, not as one may wish them to be.
In a certain sense, I can understand why this book is out of print. Realism in politics is hardly popular. What most people seek for in political theory is not reality but a rationalization for their own wishful thinking.